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Grade 8 Logical Fallacies Worksheet with Answers

Grade 8 (US) · Year 9 (UK) · Class 8 (India) · English

Unit 7: Going FurtherAdvanced: High School PreviewCCSS RI.9-10.8Advanced

Spotting faulty reasoning such as bandwagon, ad hominem, straw man and slippery slope. This free middle school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Logical Fallacies

Grade 8 · English

Score___ / 12

Name

Class

Date

Learning goal: Advanced: High School Preview · CCSS RI.9-10.8

Directions: This worksheet has 2 parts. Read the instructions at the start of each part.

Example

Name the fallacy: 'You can't trust his idea — he's always late.'

Answer: ad hominem

RememberLogical fallacies

Bandwagoneveryone does itAd hominemattacks the personStraw mantwists the other argumentSlippery slopeone step → disasterFalse choiceonly two options givenHasty generalizationtoo little evidence
Part A

Name the fallacy:

  1. 1

    She wants shorter homework, so she thinks students shouldn't learn at all.

  2. 2

    Everyone has this phone, so you should buy it.

  3. 3

    I met two rude tourists, so all tourists are rude.

  4. 4

    No one has proven aliens don't exist, so they do.

  5. 5

    A famous actor says this vitamin works, so it must.

  6. 6

    If we allow phones in class, soon nobody will learn anything.

  7. 7

    I wore my lucky socks and we won, so the socks made us win.

  8. 8

    Why worry about pollution when there are so many other problems?

  9. 9

    This has always been done this way, so it must be right.

  10. 10

    The book is true because the book says it is true.

  11. 11

    Either you support this plan or you hate our town.

Part B

Answer each question. Use full sentences where you can.

  1. 12

    Why do writers need to avoid fallacies?

★ Challenge corner for fast finishers

What can you catch but not throw?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/english/8/fallacies

Answer key (click to show)
  1. 1.straw man
  2. 2.bandwagon
  3. 3.hasty generalization
  4. 4.appeal to ignorance
  5. 5.appeal to (false) authority
  6. 6.slippery slope
  7. 7.post hoc (false cause)
  8. 8.red herring
  9. 9.appeal to tradition
  10. 10.circular reasoning
  11. 11.false dilemma (either/or)
  12. 12.fallacies make arguments illogical and less convincing
  13. ★a cold (challenge corner)

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Guides for teaching Logical Fallacies

7 Reading Comprehension Strategies Every Student Should UsePredict, question, visualize, summarize and more — what good readers do automatically, and how to practise each one.Literary Devices: 20 Examples Every Student Should KnowSimile, metaphor, personification, irony and more — each with a clear definition, an example, and a quick test for telling similar devices apart.Simple, Compound, Complex and Compound-Complex Sentences ExplainedA clear way to tell the four sentence structures apart, with examples and the two-question test students can use on any sentence.

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